There are a couple companies tackling this problem. Ripple uses peas and is on shelves now - I tried it and it was pretty good, better than soymilk but not as good as real milk.
What I'm really excited for is when milk is being produced in vats with a combination of cow gut bacteria and grass - in theory a mechanical cow's stomach could produce milk that was indistinguishable in taste from real milk but cheaper, cruelty free, cleaner, etc.
What I'm really excited for is when milk is being produced in vats with a combination of cow gut bacteria and grass - in theory a mechanical cow's stomach could produce milk that was indistinguishable in taste from real milk but cheaper, cruelty free, cleaner, etc.